ipfw question

[george roman]

does anyone what is the ipfw equivalent line for this
one?

rdr fxp0 external_ip_addres/32 port 69 -> 192.168.66.3
port 69 udp 

i use a tftpd server behind a nat and i want to
redirect all trafic coming from internet on port 69 to
the tftpd server 

10x for help

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